Only by fully understanding the development of Calliptamus italicus (L.)can outbreaks of this pest be predicted and prevented. Winter developmental threshold temperature (DTT) and effective accumulated temperature (EAT) were determined at constant temperatures. The results show that-20℃ was the critical temperature with regard to hatching. The DTTs of the C. italicus eggs, larvae, adult females, adult males and an entire generation of females and males were 862, 1612, 1707, 1782, 1502 and 1627℃ respectively and the respective EATs of these lifestages were 24984, 39746, 3779, 32378, 1 05382 degreeday and 93153 degreeday. Growth rates increased with temperature. Adult female and male body weights were heaviest at 33℃.